It happens so because factories and plants produce a lot of waste and pour it into rivers. . So they poison the water

The most of the pollution in big cities comes from cars and buses

More and more often people are told not to spend too much time in direct sunlight, because ultraviolet radiation from the sun can cause skin cancer.

Nuclear power stations can go wrong and cause nuclear pollution.

To make air clean again we need good filters at nuclear power stations, at factories and plants and also in cars and buses.

To solve environmental problems we should At home At school In the town In the country n ot throw the rubbish clean the territory take care of the park make new ecological laws make birdhouses plant trees clean our rivers and lakes use good filters in cars, buses and plants grow flowers tell our schoolmates about these problems not destroy forests save natural resources

Answer these questions 1. What does the word environment mean? 2. What are the most serious environmental problems? 3. Where does air pollution in the cities mostly come from? 4. Why is it not safe to be in direct sunlight in certain places? 5. Why are nuclear power stations dangerous?